📄 12864.h
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/*-----------------------------------------------------------*/
#define LCD_OFF 0x3E
#define LCD_ON 0x3F
#define Add_X 0xB8 //the start address of the page 0 ;(0~7)
#define Add_Y 0x40 //the start address of the Y counter ; (0~64)
#define Add_Z 0xC0 //the start address of the DDRAM ; (0~64)
/*-----------------------------------------------------------*/
#define LCD12864_DATA_PORT P0
sbit LCD12864_EN =P1^4;
sbit LCD12864_RW =P1^3; //0:write ; 1:read
sbit LCD12864_RS =P1^2; //0:the command .1:the data
sbit LCD12864_CS_L =P1^1; //select the left of the lcd when 1
sbit LCD12864_CS_R =P1^0;
sbit LCD12864_RST =P1^5;
/*------------------------------------------------------------*/
void delayus(unsigned int us)
{
while(us--);
}
void delayms(unsigned ms)
{
unsigned int i,j;
for (i=0;i<ms;i++)
{
for (j=0;j<1000;j++)
;
}
}
/*--------------------------select the LCD--------------------*/
void LCDSel(unsigned char sel)
{
switch(sel)
{
case 0: LCD12864_CS_L=0;LCD12864_CS_R=0;break;
case 1: LCD12864_CS_L=1;LCD12864_CS_R=0;break; //left
case 2: LCD12864_CS_L=0;LCD12864_CS_R=1;break; //right
default:;
};
}
/*------------------------------------------------------------*/
void WaitLCD()
{
unsigned char flag;
LCD12864_DATA_PORT=0xFF;
LCD12864_RW=1;
LCD12864_RS=0;
LCD12864_EN=1;
LCD12864_EN=1;
LCD12864_EN=0;
LCD12864_DATA_PORT=0xFF; //读有效数据
LCD12864_RW=1;
LCD12864_RS=0;
;
LCD12864_EN=1;
do
{
flag=LCD12864_DATA_PORT;
LCD12864_DATA_PORT=0xFF;
}while(!((flag&0x80)==0x80));
LCD12864_EN=0;
} //*/
/*-------------------------------------------------------------*/
void WriteDatToLCD12864(unsigned char dat)
{
WaitLCD();
LCD12864_RS=1; //the data
LCD12864_RW=0; //write
LCD12864_DATA_PORT=dat;
LCD12864_EN=1;
;
LCD12864_EN=0;
}
/*-------------------------------------------------------------*/
void WriteCmdToLCD12864(unsigned char cmd)
{
WaitLCD();
LCD12864_RS=0; //the command
LCD12864_RW=0; //write
LCD12864_DATA_PORT=cmd;
LCD12864_EN=1;
;
LCD12864_EN=0;
}
/*-------------------------------------------------------------*/
unsigned char ReadDatFromLCD12864(void)
{
unsigned char dat;
WaitLCD();
LCD12864_DATA_PORT=0xFF; //读空操作
LCD12864_RS=1; //the data
LCD12864_RW=1; //read
LCD12864_EN=1;
LCD12864_EN=1
;
LCD12864_EN=0;
LCD12864_DATA_PORT=0xFF; //来读有效数据
LCD12864_RS=1; //the data
LCD12864_RW=1; //read
LCD12864_EN=1;
dat=LCD12864_DATA_PORT;
LCD12864_EN=0;
return dat;
}
/*--------------------------------------------------------------*/
//from the chip manual
void LCD12864_init(void)
{
LCD12864_RST=0;
delayus(50);
LCD12864_RST=1;
LCDSel(0); //left and right
WriteCmdToLCD12864(LCD_OFF);
WriteCmdToLCD12864(LCD_ON);
}
/*------------------------------------------------------------*/
//x:0~7
void SetX(unsigned char x)
{
WriteCmdToLCD12864(Add_X+x);
}
/*------------------------------------------------------------*/
//y:0~127
void SetY(unsigned char y)
{
WriteCmdToLCD12864(Add_Y+y);
}
/*------------------------------------------------------------*/
//z:0~63
void SetZ(unsigned char z)
{
WriteCmdToLCD12864(Add_Z+z);
}
/*------------------------------------------------------------*/
void ClearLCD()
{
int i,j;
LCDSel(0);
for(j=0;j<8;j++)
{
WriteCmdToLCD12864(LCD_ON);
SetX(j);
WriteCmdToLCD12864(Add_Y); //diffrent from SetY(0),SetY(64);
SetZ(0);
for (i=0;i<64;i++)
{
WriteDatToLCD12864(0x00);
}
}
}
/*------------------------------------------------------------*/
//左上角第一个点为原点，向下Y为轴，向右为X轴
//x:0~63~127 y:0~63
//flag : 0：擦除某个点
// 1：显示某个点
unsigned char code Tab[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
void Dot(char x,char y,bit flag)
{
unsigned char dat;
// y=63-y; //坐标轴的移动和反转
if(x<64)
{
LCDSel(1);
SetX(y/8); //set the page address
SetY(x); //set the Y adress
dat=ReadDatFromLCD12864();
if(flag)
dat=dat|(Tab[y%8]);
else
dat=dat&(~(Tab[y%8]));
SetY(x); //set the Y adress
WriteDatToLCD12864(dat);
}
else if(x<128)
{
LCDSel(2);
SetX(y/8);
SetY(x-64);
dat=ReadDatFromLCD12864();
if(flag)
dat=dat|(Tab[y%8]);
else
dat=dat&(~(Tab[y%8]));
SetY(x-64);
WriteDatToLCD12864(dat);
}
}
/*------------------------------------------------------------*/
//draw a line between point(x1,y1) and point(x2,y2)
//flag 0:erase the line 1:draw a line
void Line(unsigned char x1,unsigned char y1,unsigned char x2,unsigned char y2,bit flag)
{
unsigned char i;
unsigned char temp;
float k;
if(x1==x2)
{
if(y1>y2)
{ temp=x1;x1=x2;x2=temp;
temp=y1;y1=y2;y2=temp;
}
for(i=y1;i<=y2;i++)
{
Dot(x1,i,flag);
}
}else
{
if(x1>x2)
{
temp=x1;x1=x2;x2=temp;
temp=y1;y1=y2;y2=temp;
}
k=(float)(y2-y1)/(float)(x2-x1);
for(i=0;i<x2-x1;i++)
{
Dot(x1+i,(unsigned char)(y1+k*i),flag);
}
}
}
/*-------------------------------------------------------------*/
void Rect(unsigned char x1,unsigned char y1,unsigned char x2,unsigned char y2,bit flag)
{
Line(x1,y1,x2,y1,flag);
Line(x2,y1,x2,y2,flag);
Line(x2,y2,x1,y2,flag);
Line(x1,y2,x1,y1,flag);
}
/*-------------------------------------------------------------*/
/*void RectArea(unsigned char x1,unsigned char y1,unsigned char x2,unsigned char y2,bit flag)
{
unsigned char temp;
unsigned char i;
if(x1>x2)
{
temp=x1;x1=x2;x2=temp;
temp=y1;y1=y2;y2=temp;
}
for(i=0;i<=x2-x1;i++)
{
Line(x1+i,y1,x1+i,y2,flag);
}
} //*/
/*-------------------------------------------------------------*/
//16*16
//x行 0~7 y列 0~127
//flag 0:汉字反白显示
/*void hz_disp(unsigned char x,unsigned char y,unsigned char n,unsigned char code * hz,bit flag)
{
unsigned char i,j;
for (j=0;j<n;j++)
{
//显示上半个汉字
for(i=0;i<16;i++)
{
//点的位置是在左还是右
if(y+16*j+i<64)
{
LCDSel(1);
WriteCmdToLCD12864(LCD_ON);
SetX(x);
SetZ(0);
SetY(y+16*j+i);
if(flag)
WriteDatToLCD12864(hz[32*j+i]);
else
WriteDatToLCD12864(~hz[32*j+i]);
}
else if(y+16*j+i<128)
{
LCDSel(2);
WriteCmdToLCD12864(LCD_ON);
SetX(x);
SetZ(0);
SetY(y+16*j+i-64);
if(flag)
WriteDatToLCD12864(hz[32*j+i]);
else
WriteDatToLCD12864(~hz[32*j+i]);
}
}
//显示下半个汉字
for(i=16;i<32;i++)
{
//先判断点是在左还是在右
if(y+16*j+i-16<64)
{ if(x+1<8) //最后一行显示上半个字
{
LCDSel(1);
WriteCmdToLCD12864(LCD_ON);
SetX(x+1);
SetZ(0);
SetY(y+16*j+i-16);
if(flag)
WriteDatToLCD12864(hz[32*j+i]);
else
WriteDatToLCD12864(~hz[32*j+i]);
}
}else if(y+16*j+i-16<127)
{
if(x+1<8) //最后一行
{
LCDSel(2);
WriteCmdToLCD12864(LCD_ON);
SetX(x+1);
SetZ(0);
SetY(y+16*j+i-16-64);
if(flag)
WriteDatToLCD12864(hz[32*j+i]);
else
WriteDatToLCD12864(~hz[32*j+i]);
}
}
}
}
} //*/
/*-------------------------------------------------------------*/
//x:行0~7
//y:列0~127
//asc: 指向标准交换码
//string: 指向要显示的字符串
//flag: 0 反白显示
void en_disp(unsigned char x,unsigned char y,unsigned char n,unsigned char code *asc,unsigned char *string,bit flag)
{
unsigned char i,j,loc;
for (j=0;j<n;j++)
{
loc=string[j]-0x20; //确定要显示的字符在asc表中的位置（乘上16）
//显示上半个字母
for(i=0;i<8;i++)
{
//点的位置是在左还是右
if(y+8*j+i<64)
{
LCDSel(1);
WriteCmdToLCD12864(LCD_ON);
SetX(x);
SetZ(0);
SetY(y+8*j+i);
if(flag)
WriteDatToLCD12864(asc[16*loc+i]);
else
WriteDatToLCD12864(~asc[16*loc+i]);
}
else if(y+8*j+i<128)
{
LCDSel(2);
WriteCmdToLCD12864(LCD_ON);
SetX(x);
SetZ(0);
SetY(y+8*j+i-64);
if(flag)
WriteDatToLCD12864(asc[16*loc+i]);
else
WriteDatToLCD12864(~asc[16*loc+i]);
}
}
//显示下半个字母
for(i=8;i<16;i++)
{
//先判断点是在左还是在右
if(y+8*j+i-8<64)
{
if(x+1<8) //最后一行
{
LCDSel(1);
WriteCmdToLCD12864(LCD_ON);
SetX(x+1);
SetZ(0);
SetY(y+8*j+i-8);
if(flag)
WriteDatToLCD12864(asc[16*loc+i]);
else
WriteDatToLCD12864(~asc[16*loc+i]);
}
}else if(y+8*j+i-8<128)
{
if(x+1<8) //最后一行
{
LCDSel(2);
WriteCmdToLCD12864(LCD_ON);
SetX(x+1);
SetZ(0);
SetY(y+8*j+i-8-64);
if(flag)
WriteDatToLCD12864(asc[16*loc+i]);
else
WriteDatToLCD12864(~asc[16*loc+i]);
}
}
}
}
}
/*-------------------------------------------------------------*/
//(x,y)要显示图片的左上角的坐标
//x 0~7 y 0~127
//l:要显示图片的长度
//w:要显示图片的宽度
//img:指向图片的数据
//执行有点慢
void img_disp(unsigned char x,unsigned char y,unsigned char l,unsigned char w,unsigned char code *img)
{
unsigned char i,j;
for(j=0;j<w/8;j++)
{
if(j+x<8) //保证不越下面的界限
{
for(i=0;i<l;i++)
{
//先判断点的位置是在右半屏还是左半屏
if(y+i<64)
{
LCDSel(1);
WriteCmdToLCD12864(LCD_ON);
SetX(x+j);
SetZ(0);
SetY(y+i);
WriteDatToLCD12864(img[j*l+i]);
}
else if(y+i<127)
{
LCDSel(2);
WriteCmdToLCD12864(LCD_ON);
SetX(x+j);
SetZ(0);
SetY(y+i-64);
WriteDatToLCD12864(img[j*l+i]);
}
}
}
}
}
/*-------------------------------------------------------------*/
//显示128*64图片
//执行效率高
void img12864_disp(unsigned char code *img)
{
unsigned char i,j;
for(j=0;j<8;j++)
{
LCDSel(1);
WriteCmdToLCD12864(LCD_ON);
SetX(j);
SetZ(0);
SetY(0);
for(i=0;i<64;i++)
WriteDatToLCD12864(img[j*128+i]);
LCDSel(2);
WriteCmdToLCD12864(LCD_ON);
SetX(j);
SetZ(0);
SetY(0);
for(i=64;i<128;i++)
WriteDatToLCD12864(img[j*128+i]);
}
} //*/⌨️ 快捷键说明
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